package com.wink_172.library;

import android.app.Activity;
import android.content.Context;

import java.util.Stack;

public class AppManager {
    private static Stack<Activity> activityStack;
    private static AppManager instance;

    private AppManager() {
    }

    /**
     * 单一实例
     */
    public static AppManager getAppManager() {
        if (instance == null) {
            instance = new AppManager();

        }
        return instance;
    }

    /**
     * 添加Activity到堆栈
     */
    public void addActivity(Activity activity) {
        if (activityStack == null) {
            activityStack = new Stack<Activity>();
        }
        if (activity != null) {
            activityStack.add(activity);
        }
    }

    /**
     * 获取当前Activity（堆栈中最后一个压入的）
     */
    public Activity currentActivity() {
        Activity activity = activityStack.lastElement();
        return activity;
    }

    public Stack<Activity> getAllActivity() {
        return activityStack;
    }

    /**
     * 结束当前Activity（堆栈中最后一个压入的）
     */
    public void finishActivity() {
        Activity activity = activityStack.lastElement();
        finishActivity(activity);
    }

    /**
     * 结束指定的Activity
     */
    private static final String TAG = "TAG";

    public void finishActivity(Activity activity) {
//		//应用即将全部关闭，清理缓存
//		if(activityStack.size()==1){
//			((AppContext)activity.getApplication()).clearWebViewCache();
//		}
        if (activity != null) {
            activityStack.remove(activity);
            activity.finish();
            activity = null;
        }
    }

    /**
     * 结束指定类名的Activity
     */
    public void finishActivity(Class<?> cls) {
        for (Activity activity : activityStack) {
            if (activity.getClass().equals(cls)) {
                finishActivity(activity);
            }
        }
    }

    //获取指定类名的Activity
    public Activity getActivity(Class<?> cls) {
        if (instance == null) {
            return null;
        }

        if (activityStack == null) {
            return null;
        }

        if (activityStack.empty()) {
            return null;
        }
        for (Activity activity : activityStack) {
            if (activity != null) {
                if (activity.getClass().equals(cls)) {
                    return activity;
                }
            }
        }
        return null;
    }

    /**
     * 结束除了ActivityA之外的其他Activity
     */
    public void finishAllActivityExceptA(Class<?> cls) {

        Activity temp = null;
        for (int i = 0, size = activityStack.size(); i < size; i++) {
            Activity aa = activityStack.get(i);
            if (null != aa) {

                if (!aa.getClass().equals(cls)) {
                    aa.finish();

                } else {
                    temp = aa;
                }
            }
        }

        activityStack.clear();
        if (temp != null) {
            activityStack.add(temp);
        }

    }

    /**
     * 结束所有Activity
     */
    public void finishAllActivity() {
        for (int i = 0, size = activityStack.size(); i < size; i++) {
            if (null != activityStack.get(i)) {
                activityStack.get(i).finish();
            }
        }
        activityStack.clear();
    }

    /**
     * 退出应用程序
     */
    public void AppExit(Context context) {
        try {
            finishAllActivity();
            System.exit(0);
        } catch (Exception e) {
        }
    }

}